diff --git a/pdfbox/src/main/java/org/apache/pdfbox/pdmodel/graphics/image/PNGConverter.java b/pdfbox/src/main/java/org/apache/pdfbox/pdmodel/graphics/image/PNGConverter.java
index eef3efa6f77..15e8d6d2e92 100644
--- a/pdfbox/src/main/java/org/apache/pdfbox/pdmodel/graphics/image/PNGConverter.java
+++ b/pdfbox/src/main/java/org/apache/pdfbox/pdmodel/graphics/image/PNGConverter.java
@@ -206,7 +206,7 @@ private static PDImageXObject convertPng(PDDocument doc, PNGConverterState state
     }
 
     /**
-     * Build a indexed image
+     * Build an indexed image
      */
     private static PDImageXObject buildIndexImage(PDDocument doc, PNGConverterState state)
             throws IOException